CN102939725A - Method of transmitting and receiving control information based on spatial-multiplexing gain - Google Patents

Method of transmitting and receiving control information based on spatial-multiplexing gain Download PDF

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Publication number
CN102939725A
CN102939725A CN2011800283024A CN201180028302A CN102939725A CN 102939725 A CN102939725 A CN 102939725A CN 2011800283024 A CN2011800283024 A CN 2011800283024A CN 201180028302 A CN201180028302 A CN 201180028302A CN 102939725 A CN102939725 A CN 102939725A
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control information
pdcch
information
resource
terminal
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CN2011800283024A
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CN102939725B (en
Inventor
洪永骏
布鲁诺·克勒克斯
丁英镐
赵俊暎
韩臸奎
池衡柱
李仁镐
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0079—Formats for control data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Abstract

A control information transmission and reception method based on a spatial-multiplexing gain, is provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined.

Description

Method based on the control information of spatial reuse gain sending and receiving
Technical field
Below describe and relate to a kind of method that sends control information by the base station, more specifically, relate to a kind of base station and support simultaneously two types the method for terminal and the method for reseptance of receiving control information.
Background technology
In order to support simultaneously terminal in the general communication system and the terminal in the enhanced communications system, control channel can be configured such that the terminal in the enhanced system can obtain the information that is associated with the broadcast channel that is assigned to counterpart terminal.In addition, this terminal can obtain for the resource information of control channel with for the information of decoding.
Summary of the invention
One total aspect, a kind of sending method is provided, this sending method comprises: Resource Block (RB) is distributed at least one data flow that sends via enhancement mode-physical down link sharing channel (E-PDSCH); Produce the control information for each of described RB; To distribute to resource-area for enhancement mode-physical downlink control channel (E-PDCCH) for each the control information of described RB; And carry out following one of process: based on described resource-area wave beam forming is carried out in each the control information that is used for described RB; Spatial reuse is carried out in pair control information that is associated with described RB based on described resource-area; With based on described resource-area pair control information that is associated with described RB carry out spatial reuse based on wave beam forming.
Described sending method also can comprise: produce indication and distribute the designator that whether uses E-PDCCH in the time period in resource subsequently, wherein, described control information comprises described designator.
Distributing the step of described control information to comprise and distribute described control information, can be the part of the employed physical resource of E-PDSCH so that be used for sending the resource-area of described control information.
Described sending method also can comprise: produce to be used for common control information that each the control information that is used for described RB is decoded, and to send described common control information via physical downlink control channel (PDCCH).
The step of described generation can comprise at least one that produces in the following information: with the group terminal identifier of the terminal of the decoding that is assigned with the information that each the scope of resource-area of control information that is useful among the described RB is associated, the information that is associated with the scope of the RB that is assigned with described at least one data flow, will carries out E-PDCCH, with for the position of demodulation and the information that pilot frequency design is associated, the information that is associated with power excursion and the information that is associated with transformat.
Distribute the step of described RB to comprise a part that is used for all RB of described at least one data flow is distributed to described at least one data flow, distribute the step of described control information can comprise with the part of the whole resource-area that is used for E-PDCCH and distribute control information, and the step that produces described common control information can comprise the generation control information, wherein, described control information comprises the information that is associated with the described part of all RB and the information that is associated with the described part of described whole resource-area.
Described sending method also can comprise: common control information is distributed to predetermined resource district for PDCCH, wherein, Class1 terminal and type 2 terminals are all successfully decoded to the information that receives via PHCCH, and type 2 terminals are different from system's support of Class1 terminal by type.
The Class1 terminal can be by the enhanced system support, and type 2 terminals can be by the General System support.
Described sending method also can comprise: produce to be used for common control information that each the control information that is used for described RB is decoded, and to send described common control information via predetermined broadcast channel.
The step that produces can comprise at least one that produces in the following information: with the group terminal identifier of the terminal of the decoding that is assigned with the information that each the scope of resource-area of control information that is useful among the described RB is associated, the information that is associated with the scope of the RB that is assigned with described at least one data flow, will carries out E-PDCCH, with for the position of demodulation and the information that pilot frequency design is associated, the information that is associated with power excursion and the information that is associated with transformat.
Distribute the step of described RB to comprise a part that is used for all RB of described at least one data flow is distributed to described at least one data flow, distribute the step of described control information can comprise with the part of the whole resource-area that is used for E-PDCCH and distribute control information, and the step that produces described common control information can comprise the generation control information, wherein, described control information comprises the information that is associated with the described part of all RB and the information that is associated with the described part of described whole resource-area.
The step that produces described control information can produce at least one in the following information: the information that is associated with the scope of the RB that is assigned with described at least one data flow, the information that is associated with the quantity of described at least one data flow, be assigned with the terminal identifier of the terminal of control information, the positional information and the pilot frequency design that are used for demodulation, the information that is associated with power excursion, the information that is associated with the terminal of dispatching together, H-ARQ information, and the information that is associated with modulation and encoding scheme.
Distribute the step of described control information to comprise and distribute described control information so that be used for E-PDCCH resource-area can with the region overlapping of the RB that is assigned with described at least one data flow.
When Class1 terminal and type 2 terminals exist, the Class1 terminal can successfully be decoded to the information that receives via E-PDCCH, type 2 terminals can not decoded to the information that receives via E-PDCCH or may be failed to the information decoding that receives via E-PDCCH, and type 2 terminals can be different from by type system's support of Class1 terminal.
The Class1 terminal can be by the enhanced system support, and type 2 terminals can be by the General System support.
On the other hand, provide a kind of method of reseptance, this method of reseptance comprises: be extracted in previous resource and distribute included previous designator in many control informations that receive in the time period; By come among E-PDCCH and PDCCH, to determine to send the channel of many objectives control information with described previous designator; And determine to come described many objectives control information is decoded based on described.
When described definite step determined to send described many objectives control information by PDCCH, the step of decoding can comprise based on the radio resource that is used for PDCCH coming described many objectives control information is decoded.
When described definite step determines to send described many objectives control information by E-PDCCH, described method also can comprise the common control information that receives described many objectives control information via one of PDCCH and predetermined channel, and the step of decoding can comprise based on described common control information coming described many objectives control information is decoded.
The step of decoding can comprise based on the group terminal identifier of jointly distributing to all terminals in the enhanced system coming described common control information is decoded.
When each bar in described many objectives control information determined to send described many objectives control information via E-PDCCH corresponding to respective stream of data and definite step, the step of decoding can comprise based on the signal to noise ratio of corresponding target control information (SNR) coming each bar in described many objectives control information is decoded.
The step of decoding can comprise: the decoding order that is identified for described many objectives control information based on the SNR of every objective control information, and continuously described many objectives control information is decoded, until the target control information of desired quantity is successfully decoded.
Described method also can comprise: the described many objectives control information based on decoding comes decoding from least one data flow of E-PDSCH or physical down link sharing channel (PDSCH) reception.
When the step of determining determines to send described many objectives control information via E-PDCCH, described many objectives control information can comprise the information that is associated with the RB that is assigned at least one data flow, and can send described at least one data flow via E-PDSCH.
When described many objectives control information is assigned to same resource-area, described resource-area is used for E-PDCCH, and can carry out one of following processing to described many objectives control information based on described same resource-area: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.
When Class1 terminal and type 2 terminals exist, the Class1 terminal can successfully be decoded to the information that receives via E-PDCCH, type 2 terminals can not decoded to the information that receives via E-PDCCH or may be failed to the information decoding that receives via E-PDCCH, and type 2 terminals can be different from by type system's support of Class1 terminal.
The Class1 terminal can be by the enhanced system support, and type 2 terminals can be by the General System support.
On the other hand, provide a kind of method of reseptance, this method of reseptance comprises: receive control information through one of following processing via E-PDCCH: beam forming processing, spatial reuse and based on the spatial reuse of wave beam forming; Based on the blind decoding scheme described control information is decoded; Identify the RB that is assigned at least one data flow that sends via E-PDSCH based on the control information of decoding; And receive described at least one data flow based on the RB that is assigned to described at least one data flow.
When Class1 terminal and type 2 terminals exist, the Class1 terminal can successfully be decoded to the information that receives via E-PDCCH, type 2 terminals can not decoded to the information that receives via E-PDCCH or may be failed to the information decoding that receives via E-PDCCH, and type 2 terminals can be different from by type system's support of Class1 terminal.
The Class1 terminal can be by the enhanced system support, and type 2 terminals can be by the General System support.
On the other hand, a kind of transmitter is provided, this transmitter comprises: scheduler, RB is distributed at least one data flow that sends via E-PDSCH, produce to be used for each the control information of described RB, and will to distribute to resource-area for E-PDCCH for each the control information of described RB; And skyplex, come among the described RB each is carried out following one of process based on described resource-area: wave beam forming, spatial reuse and based on the spatial reuse of wave beam forming.
On the other hand, provide a kind of receiver, this receiver comprises: memory is stored in previous resource and distributes included previous designator in the control information that receives in the time period; And processor, come to determine to send among E-PDCCH or the PDCCH channel of target control information based on described previous designator, and determine to come described target control information is decoded based on described.
From following description, accompanying drawing and claim, further feature and aspect can be clearly.
Description of drawings
Fig. 1 is the flow chart that the example of the method that gains to send control information based on spatial reuse is shown.
Fig. 2 is the diagram of the example of control channel that the support of enhanced terminal the is shown dynamic format that sends frame.
Fig. 3 is the diagram of the second example of control channel that the support of enhanced terminal the is shown dynamic format that sends frame.
Fig. 4 is the diagram of the 3rd example of control channel that the support of enhanced terminal the is shown dynamic format that sends frame.
Fig. 5 illustrates the flow chart of example of control information sending method of base station that the control channel of supporting Fig. 2 sends the dynamic format of frame.
Fig. 6 is the diagram of the example of control channel that the support of enhanced terminal the is shown semi-static form that sends frame.
Fig. 7 illustrates the flow chart of example of control information sending method of base station that the control channel of supporting Fig. 6 sends the semi-static form of frame.
Fig. 8 illustrates the diagram of example of form of transmission frame that is mapped with for the control channel unit (CCE) that sends E-PDCCH and is used for sending the RB of E-PDSCH.
Fig. 9 is the flow chart of example that the control information method of reseptance of enhanced terminal is shown.
Figure 10 is the flow chart that the processing of E-PDCCH being decoded based on the blind decoding scheme is shown.
Figure 11 is the diagram that the example of the transmitter of supporting simultaneously general terminal and enhanced terminal is shown.
Figure 12 is the diagram that the example of enhanced terminal is shown.
At whole accompanying drawing with in describing, unless description is arranged in addition, identical drawing reference numeral should be understood to represent similar elements, feature and structure.For clear, diagram and convenient, can exaggerate these elements relative size and describe.
Embodiment
Provide following description to help the complete understanding that the reader obtains method described here, equipment and/or system.Therefore, various changes, modification and the equivalents of method described here, equipment and/or system can be proposed to those of ordinary skill in the art.In addition, in order to promote clearness and terseness, can omit the description of known function and structure.
As described herein, the base station is supported the terminal based on the enhanced communications standard in can the terminal in the general communication system of continued support.The base station can send control information effectively, and enhanced terminal receiving control information effectively.Example described herein can be applicable to terminal and the base station in the enhanced system (for example the 3rd generation partner program Long Term Evolution AS (LTE is senior)).AS is more advanced than General System (such as 3GPP Long Term Evolution (3GPP LTE) General System).Although example described herein is based on the enhanced terminal of 3GPP LTE AS (LTE is senior) in the terminal of continued support 3GPP LTE system, should be appreciated that this only is for example purposes.Therefore, technology described herein is not limited to the LTE AS, and other AS also can be used.
Data flow can be shone upon one by one with the layer corresponding to this data flow, and therefore, in all examples described herein, these two terms can use together.
Fig. 1 illustrates the example of the method that gains to send control information based on spatial reuse.
With reference to Fig. 1, the base station can send control information for enhanced terminal based on sending method.In this example, enhanced terminal can be called as the Class1 terminal of being supported by the LTE AS, and general terminal can be called as type 2 terminals of being supported by 3GPP LTE system.
In 110, Resource Block (RB) can be distributed at least one data flow that sends via enhancement mode-physical down link sharing channel (E-PDSCH) in the base station.For example, described at least one data flow can only be distributed to some RB among all RB in the base station.In will a limited number of examples for the available RB of distribution of flows, the amount of control information can be reduced in the base station.
In 120, the base station produces the control information that is used for each RB, such as the down link control information (DCI) that is used for E-PDSCH.
In 130, same resource-area will be distributed to for the control information of each RB in the base station, such as enhancement mode-physical downlink control channel (E-PDCCH).As example, enhanced terminal can successfully be decoded to the information that receives via E-PDCCH, and general terminal may be to the information decoding failure that receives via E-PDCCH.As another example, enhanced terminal and general terminal all can successfully be decoded to the information that receives via physical downlink control channel (PDCCH).For example, demodulated reference signal (DM-RS) can be dedicated pilot.Therefore, the terminal that can receive DM-RS can be enhanced terminal, and the terminal that can not receive DM-RS can be general terminal.
As example, can only distribute control information with the part of the whole resource-area that is used for E-PDCCH.The resource-area that is assigned with control information is limited, therefore, can reduce the amount of common control information.
For example, control information can be assigned to the resource-area for E-PDCCH, so that the resource-area that is used for sending control information can be the part of the employed physical resource of E-PDSCH, rather than divides the whole resource-area that is used in E-PDCCH.
In 140, the base station is come spatial reuse is carried out in the control information that is used for each RB based on same resource-area.For example, can come the E-PDCCH of Same Physical resource is carried out spatial reuse by beam forming processing.Therefore, can improve the transmitting efficiency of the control information that sends to single terminal or a plurality of terminals.
Although not shown in Fig. 1, wave beam forming for the control information of each RB can be carried out based on same resource-area in the base station, maybe can carry out the spatial reuse for the control information of each RB.
Many control informations (many DCI that for example, are used for E-PDSCH) can be shared same frequency resources and same time resource for E-PDCCH.Therefore, can after being carried out one of following processing, many control informations send described many control informations: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.
A plurality of control information streams that in this example, can carry out one of following processing can be sent to different terminals or single terminal: spatial reuse, wave beam forming are carried out and based on the spatial reuse of wave beam forming.As another example, single control information stream can be sent to the single terminal that can obtain by beam forming processing beam forming gain.The control information stream of enhanced system can have identical control channel unit (CCE, control channel element).For example, the DCI that is used for E-PDSCH can be carried out one of following processing and can have identical CCE: wave beam forming carries out, based on the spatial reuse of same time resource and same frequency resources and the spatial reuse based on wave beam forming that carries out based on same time resource and same frequency resources.
The content of control information
In order to support the multi-user-multiple-input and multiple-output (MU-MIMO) among the E-PDSCH to send, control information (DCI that for example, is used for E-PDSCH) can comprise the following information that provides.
-be allocated for the terminal identifier of terminal of the DCI of E-PDSCH, for example, this terminal identifier can be cellular radio network temporary identifier (C-RNTI), and C-RNTI can be by scrambling to cyclic redundancy check (CRC) (CRC);
-for the bitmap of the RB that sends E-PDSCH or for the frequency resource information that sends E-PDSCH (for example, being assigned with the scope of the RB of at least one data flow that sends via E-PDSCH);
-be used for to send the quantity of the position of OFDM (OFDM) of E-PDSCH and symbol or be used for sending the time resource information (for example, being assigned with the scope of the RB of at least one data flow that sends via E-PDSCH) of E-PDSCH;
-with the information that will be associated for position and the pilot frequency design (such as reference signal (RS) pattern) of demodulation;
-power excursion;
The number of plies of-E-PDSCH (quantity of at least one data flow that for example, sends via E-PDSCH) and the information that is associated with the layer that distributes;
The information that the terminal of-together same scheduling is associated;
-for the out of Memory that E-PDSCH is decoded;
-among subsequently distribution time period period P DCCH and E-PDCCH, will be used for the information that the designator (such as 1 bit indicator) of the channel of transmission resource allocation information be associated with indication; Etc..
Example for the out of Memory that E-PDCCH is decoded can comprise, for example, mixed automatic retransfer request (H-ARQ) information (processing ID such as H-ARQ), new data indicator, redundancy versions etc., and can comprise the information (such as modulation and encoding scheme) that is associated with transformat.
When sending described designator, can provide the effect of the transmitting efficiency that can improve control channel.
For example, the base station can be selected to have the control channel of relative high transmitting efficiency among PDCCH and the E-PDCCH and carry out transmission, therefore, can improve the efficient of control channel.Based on the quantity of the channel circumstance of each terminal, terminal, with the type of the control information that is sent out etc., using the transmission of PDCCH to compare with the transmission of using E-PDCCH may be more effective.Can be different for each frame with the terminal that is scheduled, therefore, efficient can be different.Therefore, when using described designator, the base station can freely be selected and will for the control channel that sends, in order to make the expense of whole control channels minimum, therefore, can improve the transmitting efficiency of whole control channels.
The Information Availability that is associated with described designator provides further describing it in the decoding complex degree that reduces terminal at this.
Common control information
When the control channel of support of enhanced system and when supporting the control channel of General System, the base station can be effectively sends to terminal with the information that is used for the enhancement mode control channel is decoded (resource information, modulation scheme, channel coding schemes etc. that for example, are used for the enhancement mode control channel).
For example, the base station can will send to each terminal for the common control information that the control information that sends via E-PDCCH is decoded (DCI that for example, is used for E-PDCCH) via PDCCH.Enhanced terminal can decode to obtain common control information to PDCCH, and can decode to E-PDCCH based on this common control information.As example, based on the structure of the frame of General System (such as 3GPP LTE system), E-PDCCH can be arranged in the zone of PDSCH.When E-PDCCH is decoded, can obtain control information, such as the resource allocation information that is used for each terminal etc.
For example, the common control information that is used for the E-PDCCH corresponding with each enhanced terminal of LTE AS decoded can not received by each terminal, can only can jointly be received the enhanced terminal that E-PDCCH decodes.For example, common control information can comprise the position of the resource of whole E-PDCCH, the quantity that is allocated for the resource that sends E-PDCCH, the quantity of spatial reuse layer etc.Can send described information based on the group terminal identifier (such as group C-RNTI) of jointly being shared by all enhanced terminals.The group terminal identifier (for example, keeping the FFF4-FFFC that uses in the future) that is used for described purpose can be predetermined in system, and perhaps corresponding terminal can be given with the group terminal identifier report via independent broadcast channel in the base station.Therefore, enhanced terminal can obtain the information that is associated with corresponding group C-RNTI before E-PDCCH is decoded.
Public information (for example, be used for E-PDCCH DCI) can comprise following provide be used for information that E-PDCCH is decoded.
-group terminal identifier (such as group C-RNTI), for example, the group terminal identifier can be by scrambling to CRC;
The frequency resource information that-the bitmap or be used for that be used for to send the RB of E-PDCCH and E-PDSCH sends E-PDCCH and E-PDSCH (for example, be assigned with control information resource-area scope or be assigned with the scope of the RB of at least one data flow, the scope of described resource-area or the scope of described RB comprise the information that has the scope of the scope in limited resources district in limited time or limited RB to be associated with the scope of resource-area, as RB);
-be used for to send quantity or the time resource information (for example, being assigned with the scope of the resource-area of control information) of the OFDM symbol of E-PDCCH;
-with the position that is used for demodulation and the information that pilot frequency design (such as reference signal (RS) pattern) is associated;
-power excursion;
The number of plies of-E-PDCCH;
-the out of Memory that is associated with E-PDCCH; Etc..
The example of the out of Memory that is associated with E-PDCCH can comprise the information (such as the CCE aggregation extent) that for example is associated with transformat.
For example, group C-RNTI can being sent after CRC by scrambling, perhaps can send separately.Because the included group C-RNTI of common control information (for example, being used for the DCI of E-PDCCH) can be different from the terminal identifier of counterpart terminal, so general terminal may not be decoded to common control information.Be used among the enhanced terminal terminal that E-PDCCH decodes is known group C-RNTI information, therefore, can successfully decode to the common control information that is assigned to corresponding group C-RNTI in the mode identical with the scheme that PDDCH is decoded.As example, 3GPP LTE system can use the blind decoding scheme.
When use has the transmission frame of semi-static form (for example, using the form of Fig. 6), can send common control information via predetermined broadcast channel (BCH) or other channel.
The control channel that Fig. 2 illustrates the support of enhanced terminal sends the example of the dynamic format of frame.
With reference to Fig. 2, general terminal and enhanced terminal can be supported simultaneously with the transmission frame of the form with Fig. 2 in the base station.For example, the Physical Control Format Indicator Channel that sends during three symbol time sections (PCFICH) 210 and PDCCH 220 can be based on the control channel of 3GPP LTE standard.For example, PCFICH 210 can be for the channel that sends the information that is associated with the control channel format indicator (CCFI) of the position of indicating PDCCH, and PDCCH 220 can send the information that is associated with the quantity of the symbol that is used for PDCCH 220 that sends.PDCCH 220 can with control information (such as with the resource allocation information of the resource dependency connection that is sent to counterpart terminal) send to each terminal.
For example, can there be a plurality of candidates of the length of the DCI that is sent to each terminal, and can have a plurality of candidates of the size of occupied physical resource CCE for sending DCI.Its information can not sent separately.For example, each terminal can attempt a plurality of candidates' the row that might be combined into is decoded, until successfully DCI is decoded.The terminal identifier that is assigned the terminal of resource (for example, C-RNTI) can be not included among the DCI, and C-RNTI can be sent out after CRC by scrambling.
General terminal (such as 3GPP LTE terminal) can obtain control information by receive the PCFICH 210 and the PDCCH 220 that for example send during the initial time section of frame.
The base station can have the two sets of plan that control information is sent to enhanced terminal (such as the senior terminal of LTE).
As the first example, the base station can send to enhanced terminal with control information based on PCFICH 210 and PDCCH 220, and PCFICH 210 and PDCCH 220 are control channels of General System (such as 3GPP LTE system).In this example, can use in addition the new control message of the new sending mode of support of enhanced system.For example, can use in addition logical control message, and not change the control channel of 3GPP LTE standard, therefore, can make the variation of the standard that is associated with E-PDCCH (such as the control channel of LTE AS) minimum.
As the second example, the base station can send control information with E-PDCCH 240.In this example, can send the control information that is associated with the E-PDSCH 250 that is assigned with data flow based on E-PDCCH 240.For example, can use general control channel (such as PDCCH 220) to send the employed common control information 221 for E-PDCCH 240 is decoded of enhanced terminal.In this example, as mentioned above, following one of process can be carried out to the control information (such as the DCI that is used for E-PDSCH) of using E-PDCCH 240 to send in the base station: spatial reuse, wave beam forming and based on the spatial reuse of wave beam forming.For example, general terminal can receive the control information that is associated with PDSCH 230 with PDCCH 220.Therefore, can improve the transmitting efficiency of the control information that is associated with enhanced terminal, can make the decoding complex degree of E-PDCCH 240 minimum, and can reduce the amount of common control information 221 (such as the DCI that is used for E-PDSCH).
The control channel that Fig. 3 illustrates the support of enhanced terminal sends the second example of the dynamic format of frame.
With reference to Fig. 3, about E-PDCCH 340 and the E-PDSCH 350 that sends based on identical RB, the number of plies of E-PDCCH 340 may always the number of plies with E-PDSCH 350 be not identical, and the E-PDCCH 340 that sends by predetermined RB may always not send the assignment information that is associated with the E-PDSCH 350 that sends by corresponding RB.For example, except the control information that the E-PDSCH 350 of the RB identical with the RB of E-PDCCH 340 with use is associated, E-PDCCH 340 also can distribute the control information that is associated with another E-PDSCH.
A part 351 (for example, the RB corresponding with the RB of E-PDCCH 340) that is used for the RB of E-PDSCH 350 can not be used as shown in Figure 3.For example, common control information 321 can show scope for the RB that sends E-PDCCH 340 and E-PDSCH 350 with bitmap.As example, the scope that be used for to send the RB of E-PDCCH 340 and E-PDSCH 350 can be the superset of the scope of the RB that can be taken by E-PDCCH 340 and E-PDSCH 350.The space layer of the space layer of E-PDCCH 340 and E-PDSCH 350 can be different.
The control channel that Fig. 4 illustrates the support of enhanced terminal sends the 3rd example of the dynamic format of frame.
With reference to Fig. 4, a part 441 (for example, the RB corresponding with the RB of E-PDSCH450) that is used for the RB of E-PDCCH 440 can not be similar to the example shown in Fig. 3 and be used like that.
Fig. 5 illustrates the example based on the control information sending method of the base station of the dynamic format of the control channel transmission frame of Fig. 2.
With reference to Fig. 5, in 510, the base station determines whether to use E-PDCCH.When the base station was determined not use E-PDCCH, in 520, data flow was distributed to RB in the base station, and in 530, the base station uses the PDCCH as the control channel of General System to send control information.
When the base station was determined to use E-PDCCH, in 540, the base station sent to one or more enhanced terminals with group terminal identifier (such as group C-RNT).The front has been described the transmission of group terminal identifier.Within the time period subsequently, can omit the transmission of group terminal identifier.In 550, RB can be distributed at least one data flow that sends via E-PDSCH in the base station.For example, the control information that is associated with the RB that is assigned at least one stream that sends via E-PDSCH can be distributed to the same resource-area for E-PDCCH in the base station.For example, one of following processing of E-PDCCH can be carried out in the base station: the spatial reuse of spatial reuse, wave beam forming and wave beam forming.The base station can be divided and is used in the common control information that E-PDCCH is decoded, such as the DCI that is used for E-PDCCH.With reference to Fig. 1 this processing has been described.
When having assigned, in 560, use PDCCH, the base station sends for the common control information that E-PDCCH is decoded with PDCCH.In 570, the base station sends control information through one of following processing (such as the DCI that is used for E-PDSCH) with E-PDCCH: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.
Whether therefore, general terminal and enhanced terminal can be supported simultaneously with the transmission frame of Fig. 2 in the base station, and can be by based on selecting be used to the control channel that sends control information to send control information with E-PDCCH.
The control channel that Fig. 6 illustrates the support of enhanced terminal sends the example of the semi-static form of frame.
With reference to Fig. 6, the base station can send with the resource of semi-static distribution E-PDCCH 640.For example, the resource of semi-static distribution can change according to predetermined resource or the information that sends based on units of super-frames.The base station can be used for common control information that E-PDCCH640 is decoded need not to use to send in the situation of PDCCH 620 or PCFICH 610.The information corresponding with common control information can be for example be sent out via the predetermined channel on independent BCH or upper strata.Therefore, enhanced terminal may not be decoded to PCFICH 610 or the PDCCH 620 as the control channel of General System.
In certain embodiments, for each frame, the length of PDCCH 620 can be different.Therefore, when the forward part of transmission location arrangements at frame that sends E-PDCCH 640 from it, E-PDCCH 640 can be overlapping with PDCCH 620.For example, the maximum symbol lengths position afterwards that is taken by PDCCH 620 can be confirmed as the transmission position of E-PDCCH 640.For example, based on 3GPP LTE standard, the symbol after the 5th symbol can be confirmed as the transmission position of E-PDCCH 640.As another example, the symbol symbol afterwards that is assigned to E-PDCCH can send E-PDSCH 650.
The control information that is associated with general terminal can send via PDCCH 620, and the data of general terminal can be assigned to the zone of PDSCH 630.
Therefore, when the transmission frame in the example of using Fig. 2, enhanced terminal also can be decoded to PDCCH (such as the control channel of 3GPP LTE system).Yet when the transmission frame in the example of using Fig. 6, enhanced terminal can send common control information need not to use in the situation of PDCCH 620, and therefore, enhanced terminal may not be decoded to PDCCH 620.
Fig. 7 illustrates the example based on the control information sending method of the base station of the semi-static form of the control channel transmission frame of Fig. 6.
With reference to Fig. 7, in 710, data flow is distributed to RB in the base station.The example of distributing RB has been described with reference to Fig. 1.In 720, the base station determines whether to use the control channel (such as E-PDCCH) of enhanced system.
When the base station was determined not use E-PDCCH, in 730, the base station sent control information via the control channel (such as PDCCH) of General System.
When the base station was determined to use E-PDCCH, in 740, the base station sent control information via the E-PDCCH that exists on the precalculated position.The example that sends E-PDCCH with the resource of semi-static distribution has been described with reference to Fig. 6.
Therefore, when using the transmission frame of Fig. 6, general terminal and enhanced terminal can be supported simultaneously based on the method for Fig. 7 in the base station, and can be by the control channel that will select to send control information with E-PDCCH based on whether to send control information.When using E-PDCCH, the base station can utilize the resource of semi-static distribution, and therefore, may not decode to PDCCH in the base station.
Method for improvement of the transmitting efficiency of E-PDCCH
Be provided for improving three examples of the transmitting efficiency of E-PDCCH.
In the first example, following one of process can be carried out to the E-PDCCH of identical physical resources in the base station: spatial reuse, wave beam forming and based on the spatial reuse of wave beam forming.The base station can send to single terminal or a plurality of terminal with the E-PDCCH through one of following processing: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.Therefore, can improve the transmitting efficiency of control information.With reference to Fig. 1 the method has been described.
The second example can limit the resource that is taken by EPDCCH and E-PDSCH, and the information of correspondence is sent to terminal.
For example, the message bit pattern that be used for to send the RB of E-PDCCH and E-PDSCH can be with all RB among E-PDCCH and E-PDSCH one group of information that RB is associated that can take.In this example, when use had the transmission frame of dynamic format of Fig. 2, the corresponding message bit pattern of RB can be included in common control information (such as the DCI that is used for E-PDCCH), and can send via PDCCH.As another example, when use had the transmission frame of semi-static form, the corresponding message bit pattern of RB can send via independent BCH or via the predetermined channel on upper strata.
Compare with the example that is assigned to the resource of E-PDCCH among all RB of indication, based on second method, expense can reduce.For example, when RB add up to 100 and per four RB when distributing a bitmap, the length of RB assignment bit map is 25 bits.Yet, when the quantity of the RB that is used for E-PDCCH and E-PDSCH is limited to 40, can shorten the length of RB assignment bit map included among the DCI that sends via E-PDCCH.For example, the length of RB bitmap can foreshorten to 10 bits.
The 3rd example can make the physical resource that is taken by E-PDCCH be matched to the physical resource that is taken by the enhanced data transmitting channel (such as E-PDSCH) corresponding with E-PDCCH.For example, the base station can distribute control information with the resource-area that is used in E-PDCCH and the region overlapping that is assigned with the RB of data flow.
When sending control information via PDCCH, the mapping relations between the RB that is used for sending the basic physical resource unit of PDCCH and being assigned with data flow may not exist.Although the information that is associated with the RB that is used for transmission PDSCH can be identified, the information that the CCE of the PDCCH corresponding with being used for distribution is associated may not be identified.In another example, although the information that is associated with the CCE that is used for transmission PDCCH is identified, the information that is associated with the RB that is used for transmission PDSCH may not be identified.Yet as shown in Figure 2, the control information sending method of enhanced system can make the scope of the resource-area that is taken by E-PDCCH and the commensurate in scope of the RB that is taken by E-PDSCH.As mentioned above, terminal can be identified the physical resource that is taken by E-PDCCH and E-PDSCH based on the information that is associated with the restriction of included RB in the common control information.In this example, control information can be the DCI for E-PDCCH, the information that sends via the predetermined channel on BCH or upper strata.With reference to Fig. 8 its example is described.
Fig. 8 illustrates the example of form of transmission frame that is mapped with for the CCE that sends E-PDCCH and is used for sending the RB of E-PDSCH.
With reference to Fig. 8, the mapping between the RB820 that is used for sending the CCE 810 of E-PDCCH and being used for transmission E-PDSCH can be determined based on pre-defined rule (for example, RB of every CCE).For example, when the information that is associated when the restriction with the RB that be used for to send E-PDSCH sends via the common control information that is associated with the CCE that is used for that E-PDCCH is decoded, can obtain the information that is associated with the layout of CCE.
For example, common control information can comprise the message bit pattern of employed RB among E-PDCCH and the E-PDSCH, and each bitmap can be indicated the quantity of the RB that is assigned with.When enhanced terminal was decoded to the message bit pattern of RB, enhanced terminal can identify for the RB that sends E-PDSCH and is mapped to successively CCE, and identical with the quantity of the symbol that is used for transmission E-PDCCH for the quantity of the RB that sends E-PDSCH.Enhanced terminal also can be identified the information that is associated with the resource-area that sends E-PDCCH in the situation of the additional information that is not associated with the quantity of CCE.
Be used for reducing for the control channel of the terminal of enhanced system the method for decoding complex degree
＜come optionally PDCCH or E-PDCCH to be decoded with designator
When with the transmission frame of Fig. 2 or when using PDCCH based on the control information sending method of Fig. 5 to send for common control information that E-PDCCH is decoded, can send RB assignment information about enhanced terminal via PDCCH or E-PDCCH.In this example, enhanced terminal can attempt that the two is decoded to PDCCH and E-PDCCH based on two possibilities, and therefore, decoding complex degree can reduce.
Therefore, can use method for reducing decoding complex degree.As example, when enhanced terminal receives the resource distribute from the base station at first, can predeterminedly be predetermined control channel (for example from the initial predetermined control channel) receiving control information of enhanced terminal among PDCCH and the E-PDCCH.When sending with when reaching the designator that after resource is subsequently distributed the time period, is associated in the position that will distribute control information around it during the resource distribution time period subsequently, can carry out one of PDCCH and E-PDCCH and decode.Therefore, decoding complex degree can reduce.
For example, designator can be indicated during the distribution time period that is used for transmission resource allocation information (such as control information) subsequently the channel that uses.For example, designator can be included in such as the control message that sends via the E-PDCCH that is used for enhanced terminal, be used for the DCI of E-PDSCH.As another example, designator can be included in such as the control message that sends via the PDCCH that is used for enhanced terminal, be used for the DCI of PDSCH.In these examples, can reduce about the decoding complex degree of the control channel of enhanced terminal.For example, when enhanced terminal identifies when sending resource allocation information via PDCCH, enhanced terminal can not attempted E-PDCCH and the DCI that is used for E-PDCCH are decoded, and when enhanced terminal identifies when sending resource allocation information via E-PDCCH, enhanced terminal can not attempted decoding from DCI among the PDCCH, that be sent to counterpart terminal.
For example, designator is indicating channel directly, such as PDCCH being designated as " 0 ", perhaps E-PDCCH is designated as " 1 ".As another example, whether designator can indicate subsequently resource to distribute in the time period employed control channel and current resource to distribute in the time period employed control channel to compare and will be changed.For example, the state of change can be indicated as " 1 ", and the state that does not have to change is indicated as " 0 ".
The channel (such as E-PDCCH and E-PDSCH) of the channel of General System (such as PDCCH and PDSCH) and enhanced system can be used by dynamic land productivity.For example, when the desired volume of the desired volume height of data channel and control channel was low, E-PDSCH can be used as data channel, and PDCCH can be used as control channel.Therefore, can utilize wide zone for data channel.In this example, can indicate will be for the channel (such as PDCCH or E-PDCCH) of the asymmetric load factor of data channel and control channel for designator.Therefore, dynamically deal with data transmission of enhanced terminal.
Fig. 9 illustrates the example of the control information method of reseptance of enhanced terminal.
With reference to Fig. 9, in 910, enhanced terminal determines that at first whether enhanced terminal receives the resource of distributing from the base station.
When enhanced terminal received the resource of distributing from the base station for the first time, enhanced terminal can be via the predetermined channel receiving control information among PDCCH and the E-PDCCH.With reference to Fig. 9, the predetermined control channel is PDCCH.In 920, enhanced terminal decodes to obtain control information to PDCCH.In 921, enhanced terminal determines whether resource distributes based on the resource allocation information of decoding.Based on determining in 921 whether resource will be assigned with, in 922, enhanced terminal is waited for the resource distribution time period subsequently, and perhaps in 923, enhanced terminal is via data channel (such as PDSCH or E-PDSCH) receive data.In 924, the information that the enhanced terminal acquisition is associated with the control channel that can send control information during the resource distribution time period subsequently.
When enhanced terminal is not that in 930, enhanced terminal determines whether to send control information with E-PDCCH when receiving the resource of distributing for the first time.For example, enhanced terminal can be extracted in previous resource and distribute included previous designator in the control information that receives during the time period, and can determine whether to use E-PDCCH based on this designator.When described definite step was determined not use E-PDCCH, in 920, enhanced terminal was decoded to PDCCH, carries out subsequently 921.
When 930 the step of determining was determined not use E-PDCCH, in 931, the enhanced terminal acquisition was for the common control information that E-PDCCH is decoded.
For example, enhanced terminal can be by decoding to obtain common control information based on group terminal identifier (such as group C-RNTI) to public information, and described group terminal identifier can be distributed to all terminals in the enhanced system jointly.In this example, when use has the transmission frame of dynamic format of Fig. 2, can send common control information via PDCCH.Therefore, enhanced terminal can be by decoding to obtain common control information to PDCCH.As mentioned above, common control information can comprise group terminal identifier (such as group C-RNTI).
For example, when use has the transmission frame of semi-static form of Fig. 6, can come receiving common control information via predetermined channel.Predetermined channel can be independent BCH, perhaps can be other channel.Therefore, enhanced terminal can obtain common control information via predetermined channel.
Subsequently, in 940, whether the decoding to control channel during definite resource distribution time period formerly of enhanced terminal is failed.
During to the decoding failure of control channel, during resource was subsequently distributed the time period, enhanced terminal may not determine that control information is to send via PDCCH, still will send via E-PDCCH during formerly resource is distributed the time period.In order to overcome this problem, can be to PDCCH and the two pre-determined number of decoding of E-PDCCH to the failed enhanced terminal of control channel decoding.Even after carrying out repeatedly decoding trial, when the control information that distributes did not exist yet, enhanced terminal can be attempted only initial predetermined control channel being decoded.This can be called as (fall back) pattern that retreats of the failed terminal of decoding.When the base station receives feedback (such as confirming (ACK) or Negative Acknowledgement (NACK), even when the base station assigns resource, ACK and NACK also are associated with decoded result) failure is at least during pre-determined number, and the base station can be in the base station sends initial predetermined control channel (such as PDCCH or E-PDCCH) subsequently during Resources allocation.
In 941, determine whether to send E-PDCCH.When receiving PDCCH, enhanced terminal proceeds to operate 920 so that PDCCH is decoded.When receiving E-PDCCH, in 950, enhanced terminal is decoded to E-PDCCH based on the blind decoding scheme.In 970, enhanced terminal is waited for the resource distribution time period subsequently.
＜reduce the method for blind decoding complexity for E-PDCCH 〉
Figure 10 illustrates the processing of E-PDCCH being decoded based on the blind decoding scheme.With reference to Figure 10, further describe the operation 950 among Fig. 9.
With reference to Figure 10, enhanced terminal can be assigned to same resource-area, for example, is used for the resource-area of E-PDCCH.Enhanced terminal can receive the control information through one of following processing: spatial reuse, wave beam forming are carried out and based on the spatial reuse of wave beam forming.Control information is the information that is associated with the RB that is assigned at least one data flow that sends via E-PDSCH.When enhanced terminal was decoded based on the blind decoding scheme couple a plurality of candidates that are associated with control information, enhanced terminal can reduce decoding complex degree based on following methods.
When a plurality of E-PDCCH are being carried out spatial reuse, beam forming processing based on identical temporal frequency resource and based on one of spatial reuse of wave beam forming after when sending described a plurality of E-PDCCH, each among described a plurality of E-PDCCH can be used different special-purpose RS (such as DM-RS).Enhanced terminal can be not from will be assigned to the port of target enhanced terminal through identification among a plurality of streams of one of following processing: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.Therefore, enhanced terminal can be carried out blind decoding for all of the port.For example, will can increase pro rata with the number of plies as the candidate's of blind decoding target quantity.As a result, the control channel decoding complex degree of enhanced terminal can improve.For example, four streams that are encoded when therein different control informations are by spatial reuse and when being sent out, but the enhanced terminal nonrecognition will be assigned to the layer of counterpart terminal, and therefore, enhanced terminal can be attempted decoding for all layers.
The method that reduces the blind decoding complexity below is provided.When operation dispatching, E-PDCCH may have the height possibility to be sent out via the space layer that has better signal to noise ratio (SNR) in the receiving terminal.Therefore, in 951, enhanced terminal estimated to receive SNR based on the RS that is used for every layer before carrying out blind decoding.For example, enhanced terminal can be decoded to the order of minimum SNR by the highest SNR.In 952, enhanced terminal can begin the decoding of ground floor.Enhanced terminal is determined whole CCE candidate collection in 953, calculate to be used for every layer PB power in 954, and carry out blind decoding to the order of minimum SNR for whole CCE candidate collection by the highest SNR in 955.In 956, determine whether blind decoding is successful for this equivalent layer.
If unsuccessful, then in 957, enhanced terminal is decoded for whole CCE candidate collection.When the blind decoding failure, in 958, enhanced terminal is carried out blind decoding for the layer (for example, later layer) with second high SNR.By this way, can determine the order of decoding, and in 959, the layer of back be decoded, until the decoding of all layers is finished.For example, the SNR that is assigned to the space layer of corresponding enhanced terminal may be very high, and therefore, when Priority-based was carried out decoding, decoding complex degree can reduce greatly.
When in 956 during for the successfully decoded of predetermined layer, in 960, enhanced terminal can obtain by designator included in the control information information that is associated with following control channel, in described control channel, will send described control information during resource is subsequently distributed the time period.In 961, via the E-PDSCH receive data.
Enhanced terminal can be carried out blind decoding, until the control information of predetermined quantity is successfully decoded.For example, enhanced terminal can be carried out decoding to the order of minimum SNR for layer by the highest SNR, until successfully decoded with the control information of the number of the control information that will be assigned to enhanced terminal, and when the control information of predetermined quantity was successfully decoded, enhanced terminal can stop decoding.
Figure 11 illustrates the example of the transmitter of supporting simultaneously general terminal and enhanced terminal.
With reference to Figure 11, support simultaneously the transmitter of general terminal and enhanced terminal to comprise scheduler 1010, skyplex 1020 and sending module 1030.
Scheduler 1010 can be distributed to RB at least one data flow that sends via E-PDSCH, can produce the control information for each RB, and the control information that is used for each RB can be distributed to same resource-area.For example, resource-area can be used for E-PDCCH.
Skyplex 1020 can come following one of process carried out in the control information that is used for each RB based on same resource-area: wave beam forming, spatial reuse and based on the spatial reuse of wave beam forming.
Sending module 1030 can send to each terminal with the control information through one of following processing: beam forming processing, spatial reuse and based on the spatial reuse of wave beam forming.
Figure 12 illustrates the example of enhanced terminal.
With reference to Figure 12, enhanced terminal comprises receiver module 1110, memory 1120 and processor 1130.
Receiver module 1110 can be from base station receiving control information and data flow.
Memory 1120 can be stored in previous resource and distribute included previous designator in the control information that receives during the time period.
Processor 1130 determines to be used for for example sending among E-PDCCH and the PDCCH channel of target control information based on previous designator, and determines to come the target control information and executing is decoded based on this.
With reference to Figure 11 and Figure 12 transmitter and receiver has been described.Should be appreciated that, can be applicable to transmitter and receiver referring to figs. 1 through the described example of Figure 10.
Only as the explanation of non exhaustive property, terminal installation described here (that is, transmitter and/or receiver) can refer to that mobile device is (such as cell phone, personal digital assistant (PDA), digital camera, portable game machine, the MP3 player, portable/personal multimedia player (PMP), the handheld electronic book, portable laptop PC (PC), global positioning system (GPS) navigation) and the device that can carry out the radio communication consistent with communication disclosed herein or network service (such as Desktop PC, HDTV (High-Definition Television) (HDTV), Disc player, set-top box etc.).
Computing system or computer can comprise the microprocessor that is electrically connected with bus, user interface and Memory Controller.It also can comprise flash memory device.Flash memory device can be stored the N Bit data via Memory Controller.The N Bit data is by microprocessor processes or will be by microprocessor processes, and N can be 1 or greater than 1 integer.Be in the situation of mobile device at computing system or computer, can provide in addition battery to supply with the operating voltage of computing system or computer.
That described computing system or computer also can comprise application chip group, camera images processor (CIS), mobile dynamic random access memory (DRAM) etc. for what those of ordinary skill in the art it should be obvious that.Memory Controller and flash memory device can consist of with nonvolatile memory stores the solid-state drive of data/dish (SSD).
Said method, processing, function and/or software can be recorded in the computer-readable recording medium that comprises for the program command of realizing the various operations that object computer is implemented.This medium also can comprise data file, data structure etc. separately or with described program command combination.The example of computer-readable recording medium comprises: magnetic medium (such as hard disk, floppy disk and tape), optical medium (such as CD ROM dish and DVD), magnet-optical medium (such as optical disc) and be configured to especially store and the hardware unit (such as read-only memory (ROM), random access memory (RAM), flash memory etc.) of execution of program instructions.The example of program command comprise such as the machine code that is generated by compiler and comprise can by computer use the more high-level code that interpreter carries out file the two.Described hardware unit can be configured to serve as one or more software modules, in order to carry out the operation of above-mentioned exemplary embodiment, perhaps vice versa.In addition, computer-readable recording medium can be distributed between the computer system by network connection, and computer-readable code or program command can be stored and carry out in distributed mode.
A plurality of examples have below been described.Yet, should be appreciated that, can carry out various modifications.For example, if described technology is by different order execution, if and/or the assembly in described system, framework, device or the circuit makes up differently and/or by other assembly or their equivalents replacement or additional, then can realize suitable result.Therefore, other implementation within the scope of the claims.

Claims (31)

1. sending method comprises:
Resource Block (RB) is distributed at least one data flow that sends via enhancement mode-physical down link sharing channel (E-PDSCH);
Produce the control information for each of described RB;
To distribute to resource-area for enhancement mode-physical downlink control channel (E-PDCCH) for each the control information of described RB; With
Carry out one of following steps:
Based on described resource-area wave beam forming is carried out in each the control information that is used for described RB;
Spatial reuse is carried out in pair control information that is associated with described RB based on described resource-area; With
The spatial reuse based on wave beam forming is carried out in pair control information that is associated with described RB based on described resource-area.
2. sending method according to claim 1 also comprises:
Produce indication and distribute the designator that whether uses E-PDCCH in the time period in resource subsequently,
Wherein, described control information comprises described designator.
3. sending method according to claim 1, wherein, distribute the step of described control information to comprise:
Distributing described control information, can be the part of the employed physical resource of E-PDSCH so that be used for sending the resource-area of described control information.
4. sending method according to claim 1 also comprises:
Produce to be used for common control information that each the control information that is used for described RB is decoded; With
(PDCCH) sends described common control information via physical downlink control channel.
5. sending method according to claim 4, wherein, the step of generation comprises:
Produce at least one in the following information: with the group terminal identifier of the terminal of the decoding that is assigned with the information that each the scope of resource-area of control information that is useful among the described RB is associated, the information that is associated with the scope of the RB that is assigned with described at least one data flow, will carries out E-PDCCH, with the position that is used for demodulation and the information that pilot frequency design is associated, the information that is associated with power excursion and the information that is associated with transformat.
6. sending method according to claim 4, wherein:
Distribute the step of described RB to comprise a part that is used for all RB of described at least one data flow distributed to described at least one data flow,
Distribute the step of described control information to comprise with the part of the whole resource-area that is used for E-PDCCH and distribute described control information, and
The step that produces described common control information comprises the generation control information, and wherein, described control information comprises the information that is associated with the described part of all RB and the information that is associated with the described part of described whole resource-area.
7. sending method according to claim 4 also comprises:
Described common control information is distributed to predetermined resource district for PDCCH,
Wherein, Class1 terminal and type 2 terminals are all successfully decoded to the information that receives via PHCCH, and type 2 terminals are different from system's support of Class1 terminal by type.
8. sending method according to claim 7, wherein, the Class1 terminal is by the enhanced system support, and type 2 terminals are by the General System support.
9. sending method according to claim 1 also comprises:
Produce to be used for common control information that each the control information that is used for described RB is decoded; With
Send described common control information via predetermined broadcast channel.
10. sending method according to claim 9, wherein, the step of generation comprises:
Produce at least one in the following information: with the group terminal identifier of the terminal of the decoding that is assigned with the information that each the scope of resource-area of control information that is useful among the described RB is associated, the information that is associated with the scope of the RB that is assigned with described at least one data flow, will carries out E-PDCCH, with the position that is used for demodulation and the information that pilot frequency design is associated, the information that is associated with power excursion and the information that is associated with transformat.
11. sending method according to claim 9, wherein:
Distribute the step of described RB to comprise a part that is used for all RB of described at least one data flow distributed to described at least one data flow,
Distribute the step of described control information to comprise with the part of the whole resource-area that is used for E-PDCCH and distribute described control information; And
The step that produces described common control information comprises the generation control information, and wherein, described control information comprises the information that is associated with the described part of all RB and the information that is associated with the described part of described whole resource-area.
12. sending method according to claim 1, wherein, the step that produces described control information comprises at least one that produces in the following information: the information that is associated with the scope of the RB that is assigned with described at least one data flow, the information that is associated with the quantity of described at least one data flow, the terminal identifier that is assigned with the terminal of control information, the positional information that is used for demodulation and pilot frequency design, the information that is associated with power excursion, the together information, the H-ARQ information that are associated of same terminal of dispatching and the information that is associated with modulation and encoding scheme.
13. sending method according to claim 1 wherein, distributes the step of described control information to comprise:
Distribute described control information so that be used for E-PDCCH resource-area can with the region overlapping of the RB that is assigned with described at least one data flow.
14. sending method according to claim 1, wherein, when Class1 terminal and type 2 terminals exist, the Class1 terminal is successfully decoded to the information that receives via E-PDCCH, type 2 terminals are not decoded to the information that receives via E-PDCCH or the information decoding failure to receiving via E-PDCCH, and type 2 terminals are different from system's support of Class1 terminal by type.
15. sending method according to claim 14, wherein, the Class1 terminal is by the enhanced system support, and type 2 terminals are by the General System support.
16. a method of reseptance comprises:
Be extracted in previous resource and distribute included previous designator in many control informations that receive in the time period;
Come among E-PDCCH and PDCCH, to determine to send the channel of many objectives control information with described previous designator; With
Determine to come described many objectives control information is decoded based on described.
17. method according to claim 16, wherein, when the step of determining determined to send described many objectives control information by PDCCH, the step of decoding comprised:
Come described many objectives control information is decoded based on the radio resource that is used for PDCCH.
18. method according to claim 16, wherein, when the step of determining determines to send described many objectives control information by E-PDCCH,
Described method also comprises the common control information that receives described many objectives control information via one of PDCCH and predetermined channel; And
The step of decoding comprises based on described common control information coming described many objectives control information is decoded.
19. method according to claim 18, wherein, the step of decoding comprises:
Come described common control information is decoded based on the group terminal identifier of jointly distributing to all terminals in the enhanced system.
20. method according to claim 16, wherein, when each bar in described many objectives control information determined to send described many objectives control information via E-PDCCH corresponding to respective stream of data and definite step, the step of decoding comprised based on the signal to noise ratio of corresponding target control information (SNR) coming each bar in described many objectives control information is decoded.
21. method according to claim 20, wherein, the step of decoding comprises:
Be identified for the decoding order of described many objectives control information based on the SNR of every objective control information, and continuously described many objectives control information decoded, until the target control information of desired quantity is successfully decoded.
22. method according to claim 16 also comprises:
Described many objectives control information based on decoding comes decoding from least one data flow of E-PDSCH or physical down link sharing channel (PDSCH) reception.
23. method according to claim 16, wherein, when the step of determining determines to send described many objectives control information via E-PDCCH, described many objectives control information comprises the information that is associated with the RB that is assigned at least one data flow, and sends described at least one data flow via E-PDSCH.
24. method according to claim 16, wherein, when described many objectives control information is assigned to same resource-area, described resource-area is used for E-PDCCH, and based on described same resource-area one of following processing is carried out in described many objectives control information: spatial reuse, beam forming processing and based on the spatial reuse of wave beam forming.
25. method according to claim 16, wherein, when Class1 terminal and type 2 terminals exist, the Class1 terminal is successfully decoded to the information that receives via E-PDCCH, type 2 terminals are not decoded to the information that receives via E-PDCCH or the information decoding failure to receiving via E-PDCCH, and type 2 terminals are different from system's support of Class1 terminal by type.
26. method according to claim 25, wherein, the Class1 terminal is by the enhanced system support, and type 2 terminals are by the General System support.
27. a method of reseptance comprises:
Receive control information through one of following processing via E-PDCCH: beam forming processing, spatial reuse and based on the spatial reuse of wave beam forming;
Based on the blind decoding scheme described control information is decoded;
Identify the RB that is assigned at least one data flow that sends via E-PDSCH based on the control information of decoding; With
Receive described at least one data flow based on the RB that is assigned to described at least one data flow.
28. method of reseptance according to claim 27, wherein, when Class1 terminal and type 2 terminals exist, the Class1 terminal is successfully decoded to the information that receives via E-PDCCH, type 2 terminals are not decoded to the information that receives via E-PDCCH or the information decoding failure to receiving via E-PDCCH, and type 2 terminals are different from system's support of Class1 terminal by type.
29. method of reseptance according to claim 28, wherein, the Class1 terminal is by the enhanced system support, and type 2 terminals are by the General System support.
30. a transmitter comprises:
Scheduler is distributed at least one data flow that sends via E-PDSCH with RB, produces each the control information that is used for described RB, and will distribute to resource-area for E-PDCCH for each the control information of described RB; With
Skyplex comes among the described RB each is carried out following one of process based on described resource-area: wave beam forming, spatial reuse and based on the spatial reuse of wave beam forming.
31. a receiver comprises:
Memory is stored in previous resource and distributes included previous designator in the control information that receives in the time period; With
Processor determines to send among E-PDCCH or the PDCCH channel of target control information based on described previous designator, and determines to come described target control information is decoded based on described.
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